/**
 * 
 */
function check(){
	if(form.sid.value==""){
		alert("编号不能为空");
				form.sid.focus();
				return false;			
	}
	if(form.username.value==""){
		alert("用户名不能为空");
				form.username.focus();
				return false;			
	}
	if(form.username.value==""){
		alert("用户名不能为空");
				form.username.focus();
				return false;		}
}
	/*
	var regm = /^[a-z0-9]+$/;
	if (form.username.value !=""& !form.username.value.match(regm)){
		alert("用户名不正确，请再次输入！");
		form.username.focis();
		return false;
	}
	if(form.password1.value==""){
		alert("请输入密码");
				form.password1.focus();
				return false;			
	}
	if(form.password2.value==""){
		alert("请再一次输入密码");
				form.password.focus();
				return false;			
	}
	if(form.password1.value !=form.password2.value){
		alert("两次输入的密码不一致！");
		form.passsword2.focus();
		return false;
	}
			
	}*/
	
	
